www.vekn.net/tournament-rules
> 4.5. Proxy Cards
> As long as the game is not under production, the organizer of an event that is neither a National Championship nor a Continental Championship can choose to allow proxy cards in his or her event. For events where proxy cards are allowed, several points apply:
>
> there are no limit to the number of proxy cards a deck can have
> every proxy card must be a color-copy of the original card, on standard paper
> the quality of the print must allow the reading of the illustrator's name
> the organizer must mark the event as 'allowing proxy cards' on the VEKN calendar"
> Proxy-cards must be inserted in an opaque sleeve (along the rest of the crypt and/or library), before a regular VTES card.
>
You can also follow the guidelines of the PDF sets:
www.vekn.net/official-expansion-sets
> When using cards from a printable expansion such as Danse Macabre, these cards must be color printed on standard paper and inserted into opaque sleeves before another Vampire: The Eternal Struggle or Jyhad card. This requires opaque sleeves for the whole crypt and/or library.
>
Prince of Paris, France
Ratings Coordinator, Rules Director